Dimension scores are derived from public data and fields; weighted into the composite. Reference only.
NostrTool is a lightweight developer tool for the Nostr protocol. It is mainly used to create or load Nostr keys, view nsec/npub and hex formats, and test NIP-26 Delegation, event signing, and text note generation. The top of the page clearly warns users not to paste real keys into the online version and to use only disposable test keys. That makes it better suited to experimentation and debugging than production key management.
Based on the captured content, it supports entering a public key in hex/npub, a private key in hex/nsec, and a 12- or 24-word BIP-39 mnemonic, then outputs different formats for Nostr private and public keys. For NIP-26, it can generate limited signing permissions for a delegatee, set event kind restrictions and validity start/end times, and generate a delegation token, delegation tag, and signature. In the event section, users can sign a text note on behalf of the delegator using a delegation tag, and view the raw event JSON, Note ID, and Signature.
Its ecosystem integration is focused on the Nostr protocol itself. The page lists relays such as nos.lol, relay.nostr.info, relay.snort.social, nostr-pub.wellorder.net, and nostr.oxtr.dev. However, the main content does not specify the programming language, framework, API, or SDK used.
The page does not show any paid plans or payment methods, so it can basically be considered a free tool. It mentions that you can run your own NostrTool via the GitHub repo, which means self-hosting is available—especially useful for users who are sensitive about private key security. Documentation quality is relatively limited: form fields include brief descriptions, and there are security notes plus a NIP-26 link, but there are no systematic tutorials, example workflows, deployment steps, license details, or maintenance status information.
Its strengths are its focused feature set and low learning curve. It can quickly verify Nostr key formats, delegation tokens, and event-signing logic. It also provides clear security warnings and encourages self-hosting. The drawbacks are that the online version is not suitable for real private keys, the event feature is marked as “not guaranteed to work,” stability and support information are limited, and there are no team collaboration, audit, or permission management capabilities.
It is suitable for Nostr developers, protocol researchers, and wallet/client developers who need to debug NIP-26 and event JSON. It is not suitable for ordinary users to manage identity keys over the long term.
The captured content does not provide information about access from mainland China, network availability, or payments, so this is unknown. If access is unstable, consider self-hosting the GitHub repository or using local alternatives such as nostr-tools or nak.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on nostrtool.com official site.
nostrtool.com is an Unknown Dev Tools provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach nostrtool.com directly.